"I absolutely can not pressure you to love, but please don't force me to kill me."
Vihaan is not telling Riddhima the whole plan. Let me tell you people what their plan is. Till the subsequent day's morning, Raagini will be with Vansh at the vicinity of Riddhima.
Next day, Vansh will be called to an area next morning for the finalization of a commercial enterprise deal which will be fake.
He will keep on waiting there until no one comes and obviously, nobody will come. Also he will be asked to come alone.
During this, as Vihaan's drama will be finished, Vansh will be kidnapped there by some thieves which have been paid through Kevin for this work.
In this way, nobody can even guess there are two faces of Vansh existing anywhere and Riddhima did not understand this.
Because Vihaan and Kevin each recognize that Riddhima cannot tolerate anything incorrect to come about with Vansh, it is why they are now not telling about their plans to Riddhima.